53-55-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 53-55-4 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 5 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 53-55:
(4*5)+(3*3)+(2*5)+(1*5)=44
44 % 10 = 4
So 53-55-4 is a valid CAS Registry Number.